Share this post

Link to post

Share on other sites

OOH nice find! An optical range finder works on two basic pricipals, one brings an image into focus and gives range, the other , one is a steroscpic range finder. You should see an image in each eyepice, then adjust the lenses till image coincides.

I'm not sure theres much to find in the manual. Appears to be dual wide field low power and narrow field high power telescope. Its not an optical illusion the two objective lenses are different sizes.

The sighting bars obviously allow coarse aiming of the instrument (thats what the ATS girl on the right of the photo is doing). The respective scales give bearing and elevation but only relative to the instrument.

Focusing seems to be on the diopter eyepieces.

Looks like its on the correct tripod as well so as Tony B says a nice find.

The ATS girls appear to be on a HAA gunsite - sequence of photos here including height/rangefinder and Kerrison predictor: